Method AddCancel

imagedata/image_data.go:115–117

AddCancel attaches a cancel function to the image data

(cancel context.CancelFunc)

// AddCancel attaches a cancel function to the image data
func (d *imageDataAsyncBuffer) AddCancel(cancel context.CancelFunc) {
	d.cancel = append(d.cancel, cancel)
}

// Error returns any error that occurred during reading data from
// async buffer or the underlying source.